import java.math.BigInteger;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        while (scanner.hasNext()){
            BigInteger[] arr=new BigInteger[3];
            for(int i=0;i<arr.length;i++){
                arr[i]=new BigInteger(scanner.next());
            }
            Arrays.sort(arr);
            if(arr[0].add(arr[1]).compareTo(arr[2])<=0){
                System.out.println("No");
            }else{
                System.out.println("Yes");
            }
        }
    }













    public int Add(int num1,int num2) {
        while (num2!=0){
            int tmp=(num1^num2);
            num2=(num1&num2)<<1;
            num1=tmp;
        }
        return num1;
    }
}
